Earnings per share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table sets forth the computation of basic and diluted earnings per common share for the years ended December 31, 2018 and 2017.

	For the years ended December 31,
	2018		2017
	$		$
Numerator:
Net income attributable to the Company		13,154,581		16,772,852
Denominator:
Weighted-average shares outstanding
- Basic		15,546,644		15,326,797
- Dilutive effects of equity incentive awards		59,533		108,574
- Diluted		15,606,177		15,435,371
Net income per share:
- Basic		0.85		1.09
- Diluted		0.84		1.09